Inclined liquid manometers are capable of pressure measurements above and below atmospheric as well as differential pressure measurements, and are economically priced, compact and available in both stationary and portable configurations. Construction is simple with virtually indestructible molded white styrene-acrylonitrile housing, indicating tube and fluid wells, molded ABS knobs and zero adjust plunger, shock mounted glass level vial and leak proof 'O' ring seals. These manometers are very easy to use - simply fill the reservoir, adjust fluid level to zero, connect the tubing, and the gauge is ready for operation.

This item is considered a hazardous material.Please note: there may be additional shipping restrictions like freight collect or no priority air service, extra freight charges may apply. This item(s) may be restricted from shipping to a residential address, sold to private individuals or exported from the United States. For additional information or questions please call us at 1-800-323-4340 (US) or 847-549-7600 (International).

These manometers where installing in what we call bond booths. We spray adhesives as part of our production process and use the air filters to prevent and control affecting the environment. The manometer is used on the other side of the filters to indicate when the filter needs to be replace. We are not sure at which mark on the manometer that should indicate when the filter should be changed. Some of the filters are not replaced until the fluid is at the "1" mark and some filters are replaced at the ".2" mark. Which is correct?

Unfortunately we do not have an exact number, seeing how all filters and application use is different. Most customers will run the system until the filter is dirty then check and see what the manometer is reading at that point, and mark it down.

This manometer will read 0 to 3.0" H2O, and will not have the capability to measure negative pressures. The instrument would read 0" H20 if placed within a room at a slightly negative ambient pressure. Please contact our technical support department for further information on this unit.

Answered on 11/14/2013 by James from Technical Support

Q:

Is there a selector that can allow this device to measure the pressure from several different sources?

At the HVAC ductwork you do need bulkhead adapters to connect to both sides of the air filter in question. At the manometer you connect the two pieces of tubing to the appropriate fitting on the back side of the unit.

Answered on 4/25/2011 by Jon from Technical Support

Q:

Is there an installation instructions for this product? Can you install this in a drywall to moniter negative airflow? If so do you have a illustration of that installation.

Just connect the 'ambient' line to your vacuum area, and leave the 'pressure' line open to ambient air outside the vacuum area. The model 25 (I have one) is a 'true' differential manometer, and can be used for pressure, vacuum, or differential between the two.

Answered on 6/29/2017 by Lloyd from Bunnell, FL

STAFF EXPERT

A:

No, this unit will only read in inches of water.

Answered on 2/8/2011 by Mike from Tech Support

A:

The answer provided by Mike is hilarious!If it is a differential manometer it can measure pressure or vacuum, in inches of water, of course.The Model 25 might have enough sensitivity for the purpose you suggest.MeanRoy

I purchased this manometer for checking the differential pressure of a filter bank that I use. Took me about 45 minutes to get it set-up and operational. Biggest problem was getting the correct amount of fluid in the gage. Finally got it right on the third try after overfilling twice. Once calibrated, the gage works fine and is accurate for letting me know when the filters need to be changes, saving me both time and money by not replacing filters that are still working.